Auxiliary-air-supply means for internal-combustion engines.



A. G. STEWART.

AUXILIARY AIR. SUPPLY MEANS FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY25,1912.

Patented June 10, 1913.

7 QMLMW,

. UNITED S .lt iitllllftlltit e trance mien,

AUXILIARY-AIR-SUPPLY lliEANS FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented June 10, 1913.

Application filed July 25, 1912. Serial No. 711,579.

To (7 le/io/n [Ma/1y concern lie it known that t, Aim-nun (l.Fi'ri-l'wiu'r, a citizen of the llnited States, residing at Lesgtnn'elcs, in the count olflms Angeles and State o'l California, haveinvented a new and ueetul Auxiliaryniir-Supply lilo-ans forlnterual-(hnnluistion Engines, ol which the lt'ollowing is aspeeitlmtion.

This invention relates to means 'lor sup-- plying air to internalcombustion engines to aupplenuant the air passing through the carliureter, so as to dilute the mixture when necessary, and the oneohjeet; of the present invention in to provide means \vherehy a portionof the auxiliary air may he warmed so an to enable it to take up andvaporize more readily the heavy hydrocarbons of the fuel.

Other objects of the imention will appear hereina'tter,

The aeeompanyiup drawings illustrate an eml'uuliment ol. the mventiomand referring thereto l i eure l is a vertical section of the auxiliaryair valve and the means for sup ply it heated air thereto. l ip "3 if; atrans-- verae StfLliUl'l on line fl ---tt in Fin; 1.

l. designates the intake pipe of an inter nal comlmation engine which:on .nnnieatea with the evlindera ot' the engine the usual nunmer anddesignates; the exhauat maul- 'l'old or outlet pipe t'or such engine.the. auxiliary air valve is: eonneetial to the i talte pipe 'l andC(mSlH for example, Hill l'ttlli? 3 having a threadial inner end portion'l srrewine' into the intake pipe .I. and pro-- vided with. a shoulder5. forming a "al've gent, for a conical l a -e ti on a valve plug 7..Jliilalile longitudinally in the luhe {l and operated lrv any suitablemeans, for ex ample, by a llmvden wire, the inner mcmher ti ol: thelltnvden wire being uoniuu'ted to :iultl valve plug 7 and Said innernieuiher tending: through the outer inemher or eheath .10 ot thelitnvden wire which is supported. in a plug 11 St'i'ttfltl into theouter end of the tuhe 3. The tube l is un-hunted as shown at 12, therebeing preferably a series of pertorations or openings distril. utedalong its lei'igth, so as; to he opened atween-lively by the outwardmovement of the valvtr plhn; T; A, collar til; extends around the tube 3and is provided with an annnhnr enamher 15 mmmunieating with any desirednumber of the perforations 1.2, for example, the first few rows ofperforations nearest to the intake pipe it these perl'orations heing'those which are first opened in the outward movement of the valve. Apipe .17 communicates with the valve chainher 15 and extends intosuitable he'atin means, for example, the exhaust manifol 2. said pipe 17extending longitudinally within a tube '18 which extends within themanifold 2, and secured at its outer end in a bushing or plug 19 screwedinto the wall ot' the uninitold. Pipe 18 is open at its outer end andcloSed at its inner end and the pipe 17 is open at its end which iswithin the pipe lhJs'o that air may pass longitzndh nally into the outerpipe 18 and then back through the inner pipe 17. being heated in itspassage hy the heat of the exhaust; gases o the manifold. lipe 17 may hesupportrd in pipe l9 h v a spider 20.

The operation is as follows: When the auxiliary air valve is closed, themixture is drawn through the intake pipe 1 from the earhureler in theusual manner, and when the auxiliary valve plug 7 is slightly opened soas to open one or more of the .lirst rows of perl'ta-atious l2.auxiliary air will be rawn through the pipe '18. pipe 17, annulart'lltlllllttl l5. and perforations 12, into the intake pipe t. this airheing heated in its pasaae'e through the pipe 18, and this warm airpanning alon with the mixture from the rarlan-eter. will lend to morecompletely oriae the oil in the mixture. In thefirstl wing at theauxiliar air valve, the elleeton the suction through the earhureter isrelatively alight, so that there is still a foreihh-v action on the oil.and a considerable proportion ol oil is drawn over so that. the heatingof the air is ol value in tending to prevent deposition ot the oil. Asthe auxiliary air valve is .lnrllu-r opened. the suelion through theearhureter diminishes and the mixture lJL't'UIHLS so much poorer thatthe heating is no longer necessary and the openings 'l:3 whieh areexposed to the outer air, admit cold air directly from the atmosphereunder these conditions.

What I. claim is:

1. Au auxiliary air supply means for internal eomhustion engines,comprising in combination with the intake pipe of the arnine, a valvetube connected to said intake pipe, and provided with a plurality of0penlugs, a valve plug sliding in said tube and adapted to SHCUUSSlVOlYopen said openings,

and with an air inlet chamber eomn'iunieatmg with an opening in thevalve which is firstopened -by the auxiliary valve plug, the opening insaid valve tube which is last opened being. open to the outer air, and

.means for supplying heated air to said chamber.

2. An auxiliary air supply means for internal combustion engines,comprising in combination with the intake pipe of the en gine, a valvetube connected to said intake pipe, and provided with a plurality ofopenings, a valve plug sliding in said tube and adapted to successivelyopen said openings, and with an air inlet chamber communicating withopenings in the valve which are first opened-by the auxiliary valveplug, the

openings insaid valve tube which are last opened being open to the outerair, means for supplyingheated air to said chamber, comprising a pipeextending Within the exhaust means of the engine and open to the outerair, and a pipe extending into and connecting with the last named pipeand connected to the air inlet chamber.

In testimony whereof, I have hereunto setmy hand at Los Angeles,California, this 25 12th day of July 1912.

/ ALFRED C. STENVART. In presence of ARTHUR KNIGHT,

MARTHA M. LANGE.

